UNRECOVERABLE_CHANGE found

Oracle database 19c 19.17.0.0 on Redhat Enterprise 8.6. Same version on primary and standby database.

On primary database, I found unrecoverable_change# in v$datafile

select file#, name, unrecoverable_time, unrecoverable_change#
from v$datafile where unrecoverable_time is not null and unrecoverable_change# > 0;

 FILE# NAME                                               UNRECOVER UNRECOVERABLE_CHANGE#

    10 /oracle/oradata/bsn268/trading_s_data01_01.dbf     27-MAY-23              12059619
    12 /oracle/oradata/bsn268/trading_l_data01_01.dbf     08-APR-25            7607152233
    13 /oracle/oradata/bsn268/trading_l_data01_02.dbf     08-APR-25            7607152233

Same query run on standby database, there's only 1 record as below

 FILE# NAME                                               UNRECOVER UNRECOVERABLE_CHANGE#

    10 /oracle/oradata/bsn268/trading_s_data01_01.dbf     27-MAY-23              12059619

So far I have no problem with the primary database usage. I restarted the primary database ok yesterday and transaction log have been applying on standby without issue. Did some reading and found this knowledge base